David is the most probable author; and the pestilence, mentioned in Sa2 24:13-15, the most probable of any special occasion to which the Psalm may refer. The changes of person allowable in poetry are here frequently made. (Psa. 91:1-16)

dwelleth in the secret place-- (Psa 27:5; Psa 31:20) denotes nearness to God. Such as do so abide or lodge secure from assaults, and can well use the terms of trust in Psa 91:2.